A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 5889240 can be evenly divided by 1 2 3 4 5 6 7 8 9 10 12 14 15 18 19 20 21 24 27 28 30 35 36 38 40 41 42 45 54 56 57 60 63 70 72 76 82 84 90 95 105 108 114 120 123 126 133 135 140 152 164 168 171 180 189 190 205 210 216 228 246 252 266 270 280 285 287 315 328 342 360 369 378 380 399 410 420 456 492 504 513 532 540 570 574 615 630 665 684 738 756 760 779 798 820 840 855 861 945 984 1,026 1,064 1,080 1,107 1,140 1,148 1,197 1,230 1,260 1,330 1,368 1,435 1,476 1,512 1,558 1,596 1,640 1,710 1,722 1,845 1,890 1,995 2,052 2,214 2,280 2,296 2,337 2,394 2,460 2,520 2,565 2,583 2,660 2,870 2,952 3,116 3,192 3,420 3,444 3,591 3,690 3,780 3,895 3,990 4,104 4,305 4,428 4,674 4,788 4,920 5,130 5,166 5,320 5,453 5,535 5,740 5,985 6,232 6,840 6,888 7,011 7,182 7,380 7,560 7,749 7,790 7,980 8,610 8,856 9,348 9,576 10,260 10,332 10,906 11,070 11,480 11,685 11,970 12,915 14,022 14,364 14,760 15,498 15,580 15,960 16,359 17,220 17,955 18,696 20,520 20,664 21,033 21,812 22,140 23,370 23,940 25,830 27,265 28,044 28,728 30,996 31,160 32,718 34,440 35,055 35,910 38,745 42,066 43,624 44,280 46,740 47,880 49,077 51,660 54,530 56,088 61,992 65,436 70,110 71,820 77,490 81,795 84,132 93,480 98,154 103,320 105,165 109,060 130,872 140,220 143,640 147,231 154,980 163,590 168,264 196,308 210,330 218,120 245,385 280,440 294,462 309,960 327,180 392,616 420,660 490,770 588,924 654,360 736,155 841,320 981,540 1,177,848 1,472,310 1,963,080 2,944,620 and 5,889,240, with no remainder.
Since 5,889,240 cannot be divided by just 1 and 5,889,240, it is not a prime number.